chore(deps): bump skyfield from 1.21 to 1.26

Bumps [skyfield](https://github.com/brandon-rhodes/python-skyfield) from 1.21 to 1.26.
- [Release notes](https://github.com/brandon-rhodes/python-skyfield/releases)
- [Changelog](https://github.com/skyfielders/python-skyfield/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/brandon-rhodes/python-skyfield/compare/1.21...1.26)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Pipfile.lock

@@ -18,10 +18,10 @@
     "default": {
         "certifi": {
             "hashes": [
-                "sha256:5ad7e9a056d25ffa5082862e36f119f7f7cec6457fa07ee2f8c339814b80c9b1",
-                "sha256:9cd41137dc19af6a5e03b630eefe7d1f458d964d406342dd3edf625839b944cc"
+                "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3",
+                "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"
             ],
-            "version": "==2020.4.5.2"
+            "version": "==2020.6.20"
         },
         "data": {
             "hashes": [
@@ -147,10 +147,10 @@
         },
         "skyfield": {
             "hashes": [
-                "sha256:14991dde6464dfa1c34479f6b274c07f2e84323b3a751faed62dd676b7bf69ce"
+                "sha256:485ec6825730f4ad61f2698f288da00b48409546e2e524f9213910dbaa3a588c"
             ],
             "index": "pypi",
-            "version": "==1.21"
+            "version": "==1.26"
         },
         "tabulate": {
             "hashes": [
@@ -192,10 +192,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:5ad7e9a056d25ffa5082862e36f119f7f7cec6457fa07ee2f8c339814b80c9b1",
-                "sha256:9cd41137dc19af6a5e03b630eefe7d1f458d964d406342dd3edf625839b944cc"
+                "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3",
+                "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"
             ],
-            "version": "==2020.4.5.2"
+            "version": "==2020.6.20"
         },
         "chardet": {
             "hashes": [
@@ -206,39 +206,42 @@
         },
         "coverage": {
             "hashes": [
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-                "sha256:bb28a7245de68bf29f6fb199545d072d1036a1917dca17a1e75bbb919e14ee8e",
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-                "sha256:c317eaf5ff46a34305b202e73404f55f7389ef834b8dbf4da09b9b9b37f76dd2",
-                "sha256:dbe8c6ae7534b5b024296464f387d57c13caa942f6d8e6e0346f27e509f0f768",
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-                "sha256:f90bfc4ad18450c80b024036eaf91e4a246ae287701aaa88eaebebf150868052"
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-            "version": "==5.1"
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+                "sha256:46794c815e56f1431c66d81943fa90721bb858375fb36e5903697d5eef88627d",
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+                "sha256:52f185ffd3291196dc1aae506b42e178a592b0b60a8610b108e6ad892cfc1bb3",
+                "sha256:538f2fd5eb64366f37c97fdb3077d665fa946d2b6d95447622292f38407f9258",
+                "sha256:64c4f340338c68c463f1b56e3f2f0423f7b17ba6c3febae80b81f0e093077f59",
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+                "sha256:b1ed2bdb27b4c9fc87058a1cb751c4df8752002143ed393899edb82b131e0546",
+                "sha256:b360d8fd88d2bad01cb953d81fd2edd4be539df7bfec41e8753fe9f4456a5082",
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+                "sha256:c1bbb628ed5192124889b51204de27c575b3ffc05a5a91307e7640eff1d48da4",
+                "sha256:c2ff24df02a125b7b346c4c9078c8936da06964cc2d276292c357d64378158f8",
+                "sha256:c890728a93fffd0407d7d37c1e6083ff3f9f211c83b4316fae3778417eab9811",
+                "sha256:c96472b8ca5dc135fb0aa62f79b033f02aa434fb03a8b190600a5ae4102df1fd",
+                "sha256:ce7866f29d3025b5b34c2e944e66ebef0d92e4a4f2463f7266daa03a1332a651",
+                "sha256:e26c993bd4b220429d4ec8c1468eca445a4064a61c74ca08da7429af9bc53bb0"
+            ],
+            "version": "==5.2.1"
         },
         "coveralls": {
             "hashes": [
@@ -256,10 +259,10 @@
         },
         "idna": {
             "hashes": [
-                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
-                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
+                "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
+                "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
             ],
-            "version": "==2.9"
+            "version": "==2.10"
         },
         "isort": {
             "hashes": [
@@ -326,10 +329,10 @@
         },
         "requests": {
             "hashes": [
-                "sha256:43999036bfa82904b6af1d99e4882b560e5e2c68e5c4b0aa03b655f3d7d73fee",
-                "sha256:b3f43d496c6daba4493e7c431722aeb7dbc6288f52a6e04e7b6023b0247817e6"
+                "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b",
+                "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"
             ],
-            "version": "==2.23.0"
+            "version": "==2.24.0"
         },
         "six": {
             "hashes": [
@@ -354,10 +357,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:3018294ebefce6572a474f0604c2021e33b3fd8006ecd11d62107a5d2a963527",
-                "sha256:88206b0eb87e6d677d424843ac5209e3fb9d0190d0ee169599165ec25e9d9115"
+                "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a",
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             ],
-            "version": "==1.25.9"
+            "version": "==1.25.10"
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         "wrapt": {
             "hashes": [